Excel SUMIFS function - syntax & usage. You use SUMIFS in Excel to find a conditional sum of values based on multiple criteria. The SUMIFS function was introduced in Excel 2007, so you can use it in all modern versions of Excel 2013, 2010 and 2007. Compared to SUMIF, the SUMIFS syntax is a little bit more complex:
It breaks down into 8 stages over our lifetime (from birth to death) The interesting part to note is â though we develop conscience form a young age, our ideas of right and wrong are constantly changing. Many people (not the majority, but still enough to note), never make it past stage 4-6 in their development.
These days, a consensus of neuroscientists agree that brain development likely persists until at least the mid-20s â possibly until the 30s. The fact that our brains arenât developed until the mid 20s means that âlegal adultsâ (those age 18+) are allowed to make adult decisions, without fully mature brains. Someone who is 18 may make riskier decisions than someone in their mid-20s in part due to lack of experience, but primarily due to an underdeveloped brain.